Myntra.com — missing item

Hi there was a missing item in the shipment delivered to me from myntra on 21 st august which i checked on 23rd as i was busy working out of station and realised late that i didn’t receive the forever 21 sandals which i ordered for. I checked my order status from the app and it renders to be delivered and checked with the customer care and understood that all the items were shipped in one single package. To my surprise when i reported about missing product in the shipment i heard that it’s late to complain about it. Just because i reported it 2 days late myntra is denying the fact that i didn’t receive the product but it shows delivered in the app. Kindly help me resolve this issue as i now don’t have the product nor the refund of a product for which i paid 2000 inr